The coffee maker was a Keurig and we sat it in the seat when we brewed coffee at 13,000 feet in Colorado last year. Was a nice, brisk day and the coffee sure tasted good sitting on the tailgate.
The ticker bit would be fairly easy as there are lots of OBD-II reader sketches for Arduinos. But there are hundreds of parameters that can be read, including inlet air temp to the EFI system, engine coolant temp, and lots of info from the EFI system. So figuring out what to display and controlling when to display it might be a challenge. However, it is easy to set up BT from the Arduino to a phone and then control it via the phone. Or, for that matter, just send the info to the phone for display purposes.
Gary, AKA "Gary fellow":
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Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI